The Hanson-Morris solution for the critical resolved shear stress of a random array of point obstacles was modified and applied to strong ordered precipitates. The solution accounted approximately for the effects of dislocation self-interactions and elastic anisotropy. The modified solution led to a simple relationship between the antiphase boundary energy and the minimum looped precipitate diameter. This relationship was used to predict an antiphase boundary energy, for Al3Li, of 57mJ/m2. This value was in good agreement with previous determinations of the antiphase boundary energy using other techniques.

Strengthening Contributions of Strong Ordered Precipitates. J.Glazer, J.W.Morris: Philosophical Magazine A, 1987, 56[4], 507-15